Seven-time Grammy winner Taylor Swift was joined on stage by Ellie Goulding on the final night of the European leg of her blockbuster The RED Tour at London's O2 Arena, playing to a capacity crowd of more than 15500 fans on February 11, 2014 in London, England. (Photo by Dave J Hogan/Getty Images for TAS) less

Seven-time Grammy winner Taylor Swift was joined on stage by Ellie Goulding on the final night of the European leg of her blockbuster The RED Tour at London's O2 Arena, playing to a capacity crowd of more than ... more

Taylor Swift on the fifth night of the European leg of her blockbuster The RED Tour with the third of five sold-out shows at London's O2 Arena, playing to a capacity crowd of more than 15500 fans, on February 10, 2014 in London, England. (Photo by Dave J Hogan/Getty Images for TAS) less

Taylor Swift on the fifth night of the European leg of her blockbuster The RED Tour with the third of five sold-out shows at London's O2 Arena, playing to a capacity crowd of more than 15500 fans, on February ... more

Photo: Dave J Hogan, Getty Images For TAS

Taylor Swift on the fifth night of the European leg of her... Photo-5869361.79765 - SFGate

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Taylor Swift on the fifth night of the European leg of her blockbuster The RED Tour with the third of five sold-out shows at London's O2 Arena, playing to a capacity crowd of more than 15500 fans, on February 10, 2014 in London, England. (Photo by Dave J Hogan/Getty Images for TAS) less

Taylor Swift on the fifth night of the European leg of her blockbuster The RED Tour with the third of five sold-out shows at London's O2 Arena, playing to a capacity crowd of more than 15500 fans, on February ... more

Photo: Dave J Hogan, Getty Images For TAS

Taylor Swift on the fifth night of the European leg of her... Photo-5869363.79765 - SFGate

Image 4 of 13

Taylor Swift on the fifth night of the European leg of her blockbuster The RED Tour with the third of five sold-out shows at London's O2 Arena, playing to a capacity crowd of more than 15500 fans, on February 10, 2014 in London, England. (Photo by Dave J Hogan/Getty Images for TAS) less

Taylor Swift on the fifth night of the European leg of her blockbuster The RED Tour with the third of five sold-out shows at London's O2 Arena, playing to a capacity crowd of more than 15500 fans, on February ... more

Photo: Dave J Hogan, Getty Images For TAS

Taylor Swift on the fifth night of the European leg of her... Photo-5869364.79765 - SFGate

Image 5 of 13

Taboola Gallery Frame Item-85307.79765 - SFGate

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Taylor Swift on the fifth night of the European leg of her blockbuster The RED Tour with the third of five sold-out shows at London's O2 Arena, playing to a capacity crowd of more than 15500 fans, on February 10, 2014 in London, England. (Photo by Dave J Hogan/Getty Images for TAS) less

Taylor Swift on the fifth night of the European leg of her blockbuster The RED Tour with the third of five sold-out shows at London's O2 Arena, playing to a capacity crowd of more than 15500 fans, on February ... more

Photo: Dave J Hogan, Getty Images For TAS

Taylor Swift on the fifth night of the European leg of her... Photo-5869365.79765 - SFGate

Image 7 of 13

Taylor Swift was joined on stage by Emeli Sande on the fifth night of the European leg of her blockbuster The RED Tour with the fourth of five sold-out shows at London's O2 Arena, playing to a capacity crowd of more than 15500 fans. (Photo by Dave J Hogan/Getty Images for TAS) less

Taylor Swift was joined on stage by Emeli Sande on the fifth night of the European leg of her blockbuster The RED Tour with the fourth of five sold-out shows at London's O2 Arena, playing to a capacity crowd ... more

Photo: Dave J Hogan, Getty Images For TAS

Taylor Swift was joined on stage by Emeli Sande on the fifth night... Photo-5869367.79765 - SFGate

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Taylor Swift concluded the European leg of her RED tour with her 5th sold-out show at London's O2 Arena, playing to a capacity crowd of more than 15500 fans on February 11, 2014 in London, England. (Photo by Dave J Hogan/Getty Images for TAS) less

Taylor Swift concluded the European leg of her RED tour with her 5th sold-out show at London's O2 Arena, playing to a capacity crowd of more than 15500 fans on February 11, 2014 in London, England. (Photo by ... more

Photo: Dave J Hogan, Getty Images For TAS

Taylor Swift concluded the European leg of her RED tour with her... Photo-5869368.79765 - SFGate

Image 9 of 13

Taylor Swift concluded the European leg of her RED tour with her 5th sold-out show at London's O2 Arena, playing to a capacity crowd of more than 15500 fans on February 11, 2014 in London, England. (Photo by Dave J Hogan/Getty Images for TAS) less

Taylor Swift concluded the European leg of her RED tour with her 5th sold-out show at London's O2 Arena, playing to a capacity crowd of more than 15500 fans on February 11, 2014 in London, England. (Photo by ... more

Photo: Dave J Hogan, Getty Images For TAS

Taylor Swift concluded the European leg of her RED tour with her... Photo-5869369.79765 - SFGate

Image 10 of 13

Taboola Gallery Frame Item-85307.79765 - SFGate

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Taylor Swift concluded the European leg of her RED tour with her 5th sold-out show at London's O2 Arena, playing to a capacity crowd of more than 15500 fans on February 11, 2014 in London, England. (Photo by Dave J Hogan/Getty Images for TAS) less

Taylor Swift concluded the European leg of her RED tour with her 5th sold-out show at London's O2 Arena, playing to a capacity crowd of more than 15500 fans on February 11, 2014 in London, England. (Photo by ... more

Photo: Dave J Hogan, Getty Images For TAS

Taylor Swift concluded the European leg of her RED tour with her... Photo-5869370.79765 - SFGate

Image 12 of 13

Taylor Swift concluded the European leg of her RED tour with her 5th sold-out show at London's O2 Arena, playing to a capacity crowd of more than 15500 fans on February 11, 2014 in London, England. (Photo by Dave J Hogan/Getty Images for TAS) less

Taylor Swift concluded the European leg of her RED tour with her 5th sold-out show at London's O2 Arena, playing to a capacity crowd of more than 15500 fans on February 11, 2014 in London, England. (Photo by ... more

Photo: Dave J Hogan, Getty Images For TAS

Taylor Swift concluded the European leg of her RED tour with her... Photo-5869372.79765 - SFGate